1 to3 wilkinson power splitter

• Sep 13, 2004

• #1

S

stefen

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wilkinson splitter design

Dear all,

Has anyone designed a 1 to 3 unequal power splitter,
I have read the Microwave Engineering (David Pozar).
It says it is a little difficult to disign a more than 3 ways
power splitter.
Can anyone who has done it share the experience with me?

Thanks

 

• Sep 13, 2004

• #2

djalli

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3 way hf power combiner

There are many families of couplers/power splitters. These what you want are done with what are called "Un-even Rat Race" couplers most of times called "Hybrid Rings". They are mostly done in strip-line waveguides and coaxials.



I do not have a scanner but try to find this in your nearest library:

"Hybrig Circuits in microwaves" Proc. IRE trans. 1947
From W. Tyrell

"An analysis of a broadband coaxial Hybrid Ring" IRE Trans. Microwave Theory and techniq. MTT-6 1958
From: V. Albanese, P. Peyser

 

• Sep 13, 2004

• #3

djalli

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splitter wilkinson per vhf

Oh by the way here is a list of couplers/splitters/dividers known to Microwave world and surprisely some are not in Marcuwitz Waveguide handbook.

I am adding them using their most popular names:

Hybrig Ring
Wilkinson Coupler
Multihole coupler
Riblet-Saad coupler
Moreno Cross-Guide coupler
Branch-Line coupler
Riblet short-slot coupler

 

• Sep 13, 2004

• #4

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toonafishy

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hf power combiner design

this might help:

 

• Sep 13, 2004

• #5

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DJ

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broad band wilkinson power splitters

I desiged 3 way Wilkinson splitter fo X band. You can design Star or triangle circuit. You have to connect the resistor between any two junctions(3 at all) and with m. strip it is tricky. You might use only two resistors but then you loose isolation between ports.

D.J

 

• Sep 14, 2004

• #6

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stefen

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wilkinson splitter 1 by 3

Which software do you use to design to 3-way divider,
The <Microwave Engineering >says the difficult part is
to disign the crossover isolation resistor.
What is your opinion?

 

• Sep 14, 2004

• #7

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XuQing

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4 to 1 wilkinson splitter

IE3d is good for power splitter simulation.

 

• Sep 14, 2004

• #8

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DJ

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1 to 3 wilkinson power divider

What is the freq. rage you need?
You can think on different ways how to layout the circuit in order to have thtree resistors. It is impossible to have them all at one junction so use an air bridge short enought to have min influence.
If the Isolation is not critical give up on one of the resistors.

 

• Sep 15, 2004

• #9

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frannk

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cascade wilkinson splitter

What if you were to design a 4.8dB coupler and then cascade it with a wilkinson splitter? That should give you a 3way even split.

 

• Sep 15, 2004

• #10

djalli

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wilkinson power combiner 3db

Actually just to correct you who actually ask about frequency range a lot.

Couplers/power splitters are in most of the cases passive so the frequency are in contrast with active circuit is quite a lot broadband.

What is important however in couplers/power splitters is (1)coupling which is ratio in decibel incident power over coupled power and (2)Directivity which is again in dB scale ratio of coupled power over the power in decoupled port.

When they ask what is isolation that is nothing but ratio of incident power of power in decoupled port(S) in dB.

Frequency is of a second importance. What is important is that manufacturers may say that in (example 2GHz) maximum coupling is 10dB. 3dB is bandwidth is lingua-franca used by us.

Couplers are passive structures inherently. So they are quite a lot broadband.

Frequency range is important but not so much important as is for active circuits.

Rember that.

---------------------------
What are ranges stefen wants?

 

• Sep 15, 2004

• #11

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ertug

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hybrid ring combiner vhf

Does anyone know how much a 2-way combiner/splitter combo device is. I have heard it was about 1,400 $ but it is too much for such a device I think. :?:

 

• Sep 15, 2004

• #12

djalli

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wilkinson splitter

ertug said:

Does anyone know how much a 2-way combiner/splitter combo device is. I have heard it was about 1,400 $ but it is too much for such a device I think. :?:

Click to expand...

Depends on application. If you want something special (a special application) for building your own satellite why not let me charge your 2000$ for a such one. I will plate it with gold on top and etc.

You can buy power couplers/splitters/dividers for even 10$ in electronic stores those for TV's ones.

**broken link removed**

top-left in figure is the "rat race" I have mentioned before. We built couplers in in passive RF class lab last year. It costed university peanuts.

 

• Sep 15, 2004

• #13

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DJ

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hf power splitters

For 3 way microstrip wilkinson splitter in order to keep high isolations between any two ports, one has to connect the 3 resistors. It is impossible so you have to use such as air bridge, bonds etc. As frequency goes up the layout is more complicated and tricky.

By the way an easy eay but take more area as mensioned before , split it twice.

 

• Sep 17, 2004

• #14

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ertug

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unequal power splitter

I have a question about Power Divider/Combiners again. Is there a 2 way Power Divider/Combiner supports DC - 1 Ghz frequency range and costs around 500 $ or below. Insertion loss lower than 5 dB is acceptable and there is no other restrictions. :?: :?: :?:

 

• Sep 17, 2004

• #15

djalli

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vhf wilkinson splitter

ertug:

DC to 18GHz (6dB insertion loss) US$ 780?
**broken link removed**

Anzac T-1000 Power Divider 10Hz-1000MHz
$ 20US
I do not know what is insertion loss

**broken link removed**

 

• Sep 17, 2004

• #16

g86

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wilkinson splitter 1:3

Hi stefen,

Where are u using this splitter? is it working as combiner? if not then you may design 3 way unequal splitter without those isolation resistor. But remember that it depends upon where it will be used. If output ports are terminated with matched impedance and it is used as a splitter then u may neglect those isolation resistors.

g86

stefen said:

Dear all,

Has anyone designed a 1 to 3 unequal power splitter,
I have read the Microwave Engineering (David Pozar).
It says it is a little difficult to disign a more than 3 ways
power splitter.
Can anyone who has done it share the experience with me?

Thanks

Click to expand...

:?: :idea: :!: :idea: :idea: :idea: :idea: :idea: :idea: :idea: :idea: :?: :?:

 

• Sep 17, 2004

• #17

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goodboy_pl

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resistor bridge splitter 2 way

u have not defined the specs or your requirements!!!
they are necessary for chosing appropriate solution:
1. insertion loss (6db lossy or very low for power combiner)
2. bandwidth (narrow or wide)
3. frequency (HF,VHF,UHF, or microwave)

remember that power splitters can be lossy but power combiner have low loss.

BEST!

 

• Oct 17, 2004

• #18

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final_target

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I like to design and implement 3db coupler in 950-2250Mhz.After some research I found it should be implemented with "hybrid ring" sugested by S. March , D. I. Kim andY. Naito.Now I need their 2 papers:

1- S. March. "A Wideband Stripline Hybrid Ring," IEEE Trans. MTT., Vol. 16, June 1968, p. 361.

2-D. I. Kim and Y. Naito, "Broad-Band Design of Improved Hybrid-ring 3-dB Directional Couplers," IEEE Trans. MTT., Vol. MTT-30, November 1982, pp. 2040-2046.

Thanx

 

• Oct 25, 2010

• #19

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richagoel15

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Re: 4 to 1 wilkinson splitter

XuQing said:

IE3d is good for power splitter simulation.

Click to expand...

can u tell me how u designed ur resistor part in IE3d. and i want to simulate wilkinson power splitter with capacitive loading so can you tell me how to design these capacitors

---------- Post added at 16:59 ---------- Previous post was at 15:25 ----------

DJ said:

I desiged 3 way Wilkinson splitter fo X band. You can design Star or triangle circuit. You have to connect the resistor between any two junctions(3 at all) and with m. strip it is tricky. You might use only two resistors but then you loose isolation between ports.

D.J

Click to expand...

hey which software you have used for simulation . can you mail me that file. and one thing more . i want o simulate wilkinson power splitter with capacitive loading so can you help me in that .